Posted by **Larry English** on Friday, September 9, 2011 at 9:10pm.

1. The mean and standard deviation of the grades of a group of students who took an economic exam were 69 and 7, respectively. The grades have a mound-shaped distribution. According to the Empirical Rule,

a) Approximately 68% of the grades were between which grade?

b) Approximately what percentage of grades were between 55 and 76?

## Answer This Question

## Related Questions

- Quantitative methods - the mean and standard deviation of the grades of 500 ...
- Quantitative methods - the mean and standard deviation of the grades of 500 ...
- statistics - Large group of students took a test in English and the final grades...
- statistics(business) - Large group of students took a test in English and the ...
- statistics - Percentage grades in a large physics class follow a normal ...
- college - Suppose that, for a certain exam, a teacher grades on a curve. It is ...
- statistics - If the grades on a police entrance exam are normally distributed ...
- Statistics - Exam Grades. A statistics professor is used to having a variance in...
- Statistic - professor has found that the grades on a Statistics Exam are ...
- statistics - In a large class, there were 220 students who wrote both the ...

More Related Questions